KSEF-002:Invoice date too old for KSeF
Invoice issue date cannot be more than 30 days before KSeF submission date. Older invoices will be rejected by the system.
Engine Classification
Financial or legal field · Modification blocked by policy
Reason: KSeF rejects invoices with issue dates more than 30 days before submission. The invoice date cannot be changed retroactively. Issue a new invoice with a current date, or submit through alternative channels if KSeF deadline has passed.
What is KSEF-002?
KSEF-002 is a fatal validation rule defined in the KSeF specification (POL national rules). It checks whether invoice date too old for ksef.
When this rule fires, the invoice is non-compliant and will be rejected by Peppol access points and national validation services. The sending system receives a rejection response and the invoice does not reach the buyer.
Why This Error Matters
KSEF-002 is a hard failure. Invoices that trigger this rule are rejected at the access point and never reach the recipient. In Peppol networks, this means your sending system receives an MLR (Message Level Response) with a rejection status. The invoice must be corrected and re-sent, adding delay to your payment cycle.
Validator Behavior
- ·Causes invoice rejection
- ·Error returned: KSEF-002
- ·Specification: KSeF
How to Fix It
Technical Reference
Common Causes
- ·Invoice created but not submitted in time
- ·Backlog of invoices
- ·System date misconfiguration
Seeing this in production? The API handles KSEF-002 automatically. See the fix response →
Frequently Asked Questions
Invoice issue date cannot be more than 30 days before KSeF submission date. Older invoices will be rejected by the system.
Submit invoices within the 30-day window. You can also use Invoice Navigator's automatic Fixer tool to correct this instantly.
Yes, KSEF-002 is a critical error that will cause invoice rejection. It must be fixed before submission to ensure your invoice is accepted by the recipient's system.
Many instances of KSEF-002 can be automatically corrected using Invoice Navigator's Fixer tool. Upload your invoice and the tool will identify and fix common issues, including invoice date too old for ksef.
Last updated: 19 January 2026
Handle KSEF-002 Automatically in Your Pipeline
The compliance engine auto-remediates this error with controlled safety policies and evidence pack generation.